• Modulation Tutorial

The information coming out of the transmitter needs to be changed (modulated) to then be
transmitted. At the receiver, must do the reverse process, or the demodulation of the
information, converting the same to the original information.

• Modulation : changing the characteristics of the signal being transmitted.
•  Demodulation , the reverse process of modulation.

Our voice, as well as most of the sounds found in nature, is analog. Until there are purely

analog transmitters, such as the transmission of AM and FM. But let us not worry about it,

almost everything today is even digital.

 Overview, information and tutorial about the basics of what is phase shift keying, PSK, used for radio communications applications, and in particular for digital forms of radio communications.
This phase modulation, PM tutorial includes:

·         What is phase modulation

·         Phase shift keying, PSK

·         Minimum shift keying, MSK

·         Gaussian minimum shift keying, GMS

·         Quadrature amplitude modulation, QAM

Different forms of QAM

Phase shift keying, PSK, is widely used these days within a whole raft of radio communications systems. It is particularly well suited to the growing area of data communications. PSK, phase shift keying enables data to be carried on a radio communications signal in a more efficient manner than Frequency Shift Keying, FSK, and some other forms of modulation.
With more forms of communications transferring from analogue formats to digital formats, data communications is growing in importance, and along with it the various forms of modulation that can be used to carry data.
There are several flavors of phase shift keying, PSK that are available for use. Each form has its own advantages and disadvantages, and a choice of the optimum format has to be made for each radio communications system that is designed. To make the right choice it is necessary to have a knowledge and understanding of the way in which PSK works. ....... Read more.